Nut-lock.



FATBNTED DEG. 17. 1907.

N. 373,83ll

E. 0. BEVERAGE.

N UT LUCK.

APPLICATION FILED JUNE 2o,

To all whom it seated inan the ball when the nut is rrEn sra EDWARD f entre i Application iiled may concern:

Be it known that I, EDWARD CLAY BEVER- AGE, a citizen of the United States, residin at Monterey, in the county of Highland an State of Virginia, have invented a new and useful Nut-Lock, of which the following is a specification. y

This vinvention relates to a nut lock, both simple and efficient, for maintaining a .nut in position after being screwed tightly in place.

The object of the invention is to provide a nut lock which cannot become loosened by shocks nor jars, nor can it be removed by a wrench alone, a key being a necessary accompaniment to hold the lock in inactiye position while the nut is being lrotated in a backward direction.

ln the accompanying is -a vertical sectional view of the iniention applied. Fig. 2 lis an underside vieflr'pf the nut. Figs. 3, 4 and 5 are similarqsectional views of the nut showing the locking and unlocking operation.

Similar numerals of reference 'are usedfor like parts in'all the figures.

A screwbolt i oi typical form is represented in the drawings as extending through two parts to be united and securely fastened by a nut 2 provided with the improved locking means. This consists of a ball 3 either corrugated or smooth, the icrmer referred inclined recess 4, ma c in the inner face of the nut 2 between the bolt hole 5 and one side of the nut. The general direction of the recess 4 may be curved as in Fig. 2, or straight, its greatest depth, which is at' one end is slightly less than the diameter of' the ball 3 and as represented in Fig. l, the ball seat is preferablysemi-circular in cross section. The recess,. at its lowest dercut as at 6 leaving a li 7 whic upholds to -e unscrewed. it is important that the ball project slightly beyond the face of the nut when in the low;l est art of the recess 4 so that it will bear firm y against the fixed object when the nut is screwed home. in this way thefball will be in position-t0 jam or wedge between .the 'nut and the iixed object when an attempt is ni ade to turn it backward.

Through the nut from its outer` face to re` Specication of Letters Patent.

im 20.1907. sean E0. 379.940.

drawings: Figure 1 art is uncess 4 is a hole 8, so situated with respect to ,the ball 3, that when a key 9 is introduced into the hole and pushed through the recess, it will force the ball into the undercut part i and revent it' from rolling along the recess.

The 'p 7 prevents the ball from dropping so lonlghas the key is in osition. f o

,y e nut-is applic by -iirst placing the ball in the recess and then introducing the key into the opening 8 to prevent the ball dro ping. The nut is then screwed on the bo t and tightened in the usual manner by a wrench. As soon as the nut is nearl seated the key may be withdrawn as the irection in which the nut 'turns willkeep the ball in thelowest portion of the recess.. attempt be made to remove the nut without the key, the ball will Vbe wedged between the nut and, the fixed object and'rotation prevented.

The key 9 is illustrated in the drawing 'as merely a straight round pin, it may however be made in man different shapes which will prevent the nut beingremoved by unauthorized parties.

Should an- Havin thus described the invention, what l is claime is l. A. nut 'lock comprising abolt, a nut having-an inclined recess in its under face and a l rejecting lip at one end of said recess and a ball movable in said recess and adapted to be supported-on said lip.

2. A nut lock comprising a bolt, a nut having an inclined recess in its under face with an undercut portion forming a lip, and a bail movable in said lrecess and adapted to enter said recess and be supported by said lip.

' 3. Anut lock comprising a nut having an 'inclined recess in its under face with an un- *dercirt portion at one end and a key hole eX- ltending from its outer faceto said recess, and

that I claim the foregoing as 

